Lock



July 22 1924. 1,502,238

J. A. DUFRESNE LOCK Filed April 24. 1923 E3 25 G a 2.29 G 'E7 )will rlilillll/A* v. A

TTQR NEY Patented July 22, 1924.

JOSEPH ANTONIO DUFRESNE, 0F IVEQTRVEAL QUEBEC, CANADA.

Loox.

Application mea April ai;A

Y Lock, of which the following is the specifica-1' tion. u y,

The invention relates to a lock, 'asl de-v scribed in thepresent specification and shown in the accompanying drawings that,y form part of the same. A i n The invention consists essentially 'of the novel features pointed Vout broadly and specifically in the claims for novelty following a description containing an explanation in detail of an acceptable form of the inven` The objects of the invention are toL ,avoid felonious interference'with locks in'hotels, public buildings and other places, where the Acylinder mortise-locks are used;y to `insure safety to occupants of buildings by furnishing a lock toa lock operable only byk the person interested; to positively prevent the removal of a lock fromv its position by other than the possessor of the auxiliary key g and Y generally to provide in locks a safety device, whereby unlawful entrances-.can be avoided, and to do this without materially adding to the cost of production. f o

In the drawings, Figure `1 is a side elevation of a mortise-lock casing and front plate, broken away and sectioned'tofdiscl'ose the features of thisinvention. v

Figure 2 is an elevation of the yfront plate, showing ythe auxiliary lock.

Figure 3 is al perspective erating screw and discs.

detail ofthev opf-` Figure 4 is a perspective detail of the lock;` n

ing bolt member.

Like numerals of reference indicate corresponding parts in the'various figures.

Referring to the drawings, the cylinder 1 is shown as screwed into the lock casing 2 as usual and projects outwardly therefrom as usual to reach through the thickness of the door and inwardly through said casing, having the locking bolt slot 3 across the threads to the extreme inner end within said casing 2.

This feature as described is not novel as these cylinder locks are nearly all made with the slot across the threads longitudinally arranged with the cylinder, and the customary `192,3. serial No. estereo.k

way of operating the locking bolt member 'is by means of a screw turned from the front plate and this is also done 4in the present instance, in which the locking boltl4 projects from'thefbody 5 at/the'upper end and a similarly shaped guide bar 6 projects from the lower end, bothfthe bolt 4 and bar 6 sliding inv corresponding slots in the casing 2, said body' being centrally slottedfat 7 and "hav- .ing the screw hole Sthrough the endwall `,'0f"said slot;A v" i i f i* The operating' screw@ is screwed into body to 'the head 15.k f

Thebarrel 16 of the auxiliary lock turns in the cylinder 17 and has the ylongitudinal key ,slot 18 shaped to vsuit the wards yof the particular key usedy and this slot 18 crosses the. lower `ends ofthe tumbler pin holes 19 in Vwhich the pins, are/inserted Vover the balls 21.l ,The pin case 22 extends yfrom the cylinder 'Hand hascorresponding'pin holes 23 to the pin 4holes `19f-and1pin`s` `24in [said holes23,l which are helddo'wn totheir'engagement with the pins 2O by the springs'25. l

' The'lcylinder17 and pin case 22 form one rigidy member" and are -secured within the `casing2 vopposite to the cylinder 1 and immediately behind the plate`26, and in align lment withthe hole 27 in 'saidplate". yThe 1pm case 22 rests on-a boss and issecured thereto bythe .screw 28and' abuts kthe boss 29, so that itfis firmlyliel'd place.

rThe discs` 10 13`are secured toI the barrel 16,y by the yscrewsy 30 and 31 and as the r-dis`c10"abuts thecylinder 17 an'dpin case 22 the barrel is` securely held in said cylinder and further the square head of the operating screw 9 being held between the barrel 16 and disc 13, the auxiliary lock and operating screw together form the operating member for inserting and withdrawing the locking bolt 4.

The insertion of the key 32 registering with the combination of the pins 2O and 24 brings them in a position where the split between the case pins and barrel pins permits the free rotation of the barrel by means of the key and consequently the rotation of the screw 9, therefore the only way that the 5 in the hole 8 and projects through tothe main cylinder'can'be removed from tli'e casing 2 is by inserting the key in the auxiliary lock and drawing the locking bolt member and locking bolt away rcmjsaidmaincyl'- inder, leaving the latter free to be nnscrewed so as to free the casing in order that it may be removedrom its recess `in the door for changing its combination oii lrepair s, YV This auxiliary lock makes it next to im imdigpf ee., meer key .-aebeam'n, amiY yalso removingfand taking'away thelock; V

, What lclaimis:

forming an operating member for seeuring and releasing the fastening otsaid removablemember. ,c

' 2. In, avlock, allock casing and a key mem? 4loer adapted ntows'ecnrei saidfcasing within a closure, a fastening for Ysaidukey member for operating said fastening. n In a lock,V aflock casingand a .key-member Secured therein and. .removable there- V een s1id1ngnembf-enaging eidikey' member Wlthln Said Citerna` and .an auxlllary 'v lock havng a suitable opera-ting memberfprojecting ktlierefromA to sliding member. c 4i- In a 100.192 leek easing anda ,key'memf ber screwed into said casing and projecting ,A ontwardly therefrom., y a sliding member* an-d an auxiliary lock having anoperatingscrew projection engaging said sliding member.

- gIn a lock, a lockv casing anda cylindrical key member screwing into said oas- K ing and slotted, alocking boltv `member* slidably arranged in said casing and having a locking bolt projecting into the cylinders slot,Y an' onera'ting screw engaging said locking bolt member and an auxiliary barrel and cylinder lock engaging said screw for eperating said locking bolt member.

6. In a lock, a mort-ise-lock casing and a cylinder and barrel key member screwing into said casing through the lock recess wall and slotted across the threads; a locking bolt member, slidably arranged in saidrcasing and having .a locking bolt projecting into the cylinder islet; an operating screw engagingv ysaid VlQking bolt vmember and an wenn@ barrel and eyiiadeickengaging :sajdsseijew fsf persing Said leaking een inggand slotted, a lockingbolt member hav- ,inga Eeentrally slotted body and screw' hole the; te' lall f Said slot and a lug earning a leaking V aan ma@ similariug forming a guide 'and an anxiliary lock hav- ,a engaging said locking bolt member SaidA -Slineyv lle. i i

nl a 10er, a 10er" @negarle affyhndrical key member screwing intor saidcasing and slotted, a locking bolt member slid'- ably arranged in said casing and having al locking bolt projecting into the cylinder within saidlclosnre v, andan auxiliary lockV slot, an Y operatingV screw having Y a -v square h ead7 a disc inonntedvvon said screwxand held by a locking disc, and an auxiliarylock having a barrel AmemberA secured to saidl discs and adapted to operate said screw,

`9. Inra; lock, Valoek casing and a cylinand slotted, alckingbolt member slidably arranged in said casing and havinga lockbolt .projecting into the cylinder slot, an operating screw engaging said locking boltl member andV an auxiliary.lockfsecured a within saidcasing and having a barrel memberprojecting through the front plate andI having discs atits inner end holdingit in ,the cylinder and operatively connected to said screw. Y Y t Signed ,atY Mntreal, Canada, lthis 21st, day of April, 1923. y l,

rosiers AToNio D'UFRESZE. 

